Journal
PHYSICAL REVIEW LETTERS
Volume 104, Issue 20, Pages -Publisher
AMER PHYSICAL SOC
DOI: 10.1103/PhysRevLett.104.207601
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Funding
- U.S. Department of Energy, Office of Basic Energy Sciences [DE-FG02-04ER46147]
- Division of Materials Sciences and Engineering, U.S. Department of Energy [DE-AC05-00OR22725]
- U.S. Department of Energy, Office of Science, Office of Basic Energy Sciences [DE-AC02-06CH11357]
- Division Of Materials Research
- Direct For Mathematical & Physical Scien [832760] Funding Source: National Science Foundation
- U.S. Department of Energy (DOE) [DE-FG02-04ER46147] Funding Source: U.S. Department of Energy (DOE)
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The origin of the functional properties of complex oxide superlattices can be resolved using time-resolved synchrotron x-ray diffraction into contributions from the component layers making up the repeating unit. The CaTiO(3) layers of a CaTiO(3)/BaTiO(3) superlattice have a piezoelectric response to an applied electric field, consistent with a large continuous polarization throughout the superlattice. The overall piezoelectric coefficient at large strains, 54 pm/V, agrees with first-principles predictions in which a tetragonal symmetry is imposed on the superlattice by the SrTiO(3) substrate.
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